Finding the Fourth Proportional to 1,392,728.17, 1,921,994.04 and 789,116.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,728.17 : 1,921,994.04 = 789,116.17 : x
2. Step 2: Convert to fraction form
   1,392,728.17/1,921,994.04 = 789,116.17/x
3. Step 3: Cross multiply
   1,392,728.17x = 1,921,994.04 × 789,116.17
4. Step 4: Simplify right side
   1,392,728.17x = 1,516,676,578,439.82
5. Step 5: Solve for x
   x = 1,516,676,578,439.82/1,392,728.17
6. Step 6: Final answer
   x = 1,088,996.84